. What happens to the velocity and acceleration of an object in free fall? A The velocity decreases as the acceleration remains the same. B The velocity increases as the acceleration remains the same. C The velocity increases and the acceleration decreases. D The velocity increases and the acceleration increases. E Both velocity and acceleration decrease.. Neglecting air resistance, what are the forces acting on a bullet after it has left the barrel of a rifle? . A The force of air acting up and gravity acting down. . BOnly the force of gravity acting straight down. . C There are no forces acting at this point. . DAll of the above are true.. What happens to the kinetic energy of a falling book when the book hits the floor? . A The kinetic energy is destroyed. . B The kinetic energy is converted to heat only. . C The kinetic energy is converted to heat and sound